138138820132 has 24 divisors (see below), whose sum is σ = 249575800320. Its totient is φ = 66832068480.

The previous prime is 138138820121. The next prime is 138138820153. The reversal of 138138820132 is 231028831831.

It is a happy number.

It is a super-2 number, since 2×138138820132² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863628 + ... + 1011004.

It is an arithmetic number, because the mean of its divisors is an integer number (10398991680).

Almost surely, 2^138138820132 is an apocalyptic number.

It is an amenable number.

138138820132 is a deficient number, since it is larger than the sum of its proper divisors (111436980188).

138138820132 is a wasteful number, since it uses less digits than its factorization.

138138820132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154971 (or 154969 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 138138820132 in words is "one hundred thirty-eight billion, one hundred thirty-eight million, eight hundred twenty thousand, one hundred thirty-two".